Gigabytes to Terabytes

Convert GB to TB instantly — decimal (SI), with a table, common file sizes, and a live calculator.

1 GB equals 0.001 TB.

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Result (TB)0.001 TB

GB to TB table

GBTB
1 GB0.001 TB
2 GB0.002 TB
3 GB0.003 TB
5 GB0.005 TB
10 GB0.01 TB
15 GB0.015 TB
20 GB0.02 TB
25 GB0.025 TB
30 GB0.03 TB
40 GB0.04 TB
50 GB0.05 TB
60 GB0.06 TB
75 GB0.075 TB
90 GB0.09 TB
100 GB0.1 TB
120 GB0.12 TB
150 GB0.15 TB
200 GB0.2 TB
250 GB0.25 TB
300 GB0.3 TB
400 GB0.4 TB
500 GB0.5 TB

TB to GB (reverse)

TBGB
1 TB1000 GB
2 TB2000 GB
3 TB3000 GB
5 TB5000 GB
10 TB10000 GB
15 TB15000 GB
20 TB20000 GB
25 TB25000 GB
30 TB30000 GB
40 TB40000 GB
50 TB50000 GB
60 TB60000 GB
75 TB75000 GB
90 TB90000 GB
100 TB100000 GB
120 TB120000 GB
150 TB150000 GB
200 TB200000 GB
250 TB250000 GB
300 TB300000 GB
400 TB400000 GB
500 TB500000 GB

Common file sizes

GBTB
5 GB0.005 TB
10 GB0.01 TB
25 GB0.025 TB
50 GB0.05 TB
75 GB0.075 TB
100 GB0.1 TB
120 GB0.12 TB
150 GB0.15 TB
200 GB0.2 TB
300 GB0.3 TB
400 GB0.4 TB
500 GB0.5 TB

How it scales

0.030.050.080.10255075100GB

1 GB in other units

1000MB1000000KB1000000000bytes

The ratio at a glance

1 GB0 TB

Decimal vs. binary — why 1 GB isn't always 1 GB

This page uses the decimal (SI) convention: 1 KB = 1000 bytes, 1 MB = 1000 KB, 1 GB = 1000 MB, and 1 TB = 1000 GB. That is how hard-drive and SSD makers, Google, and macOS state capacity. Windows and RAM, by contrast, use the binary (IEC) convention, where 1 KiB = 1024 bytes and 1 GiB = 1024 MiB. The gap grows with size: 1 GiB = 1.073741824 GB, which is why a 1 TB drive (1000 GB) shows as about 931 GiB in Windows. No storage is missing — these are simply two different measuring systems.

Data-storage conversions are exact and rest on fixed factors — for more unit pairs, use our data storage conversion hub.

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Frequently asked questions

How many TB are in 1 GB?

1 GB equals 0.001 TB.

How many TB are in 2 GB?

2 GB equal 0.002 TB.

How do I convert GB to TB?

Divide the amount in GB by 1000 to get TB.

Is 1 GB equal to 1000 MB or 1024 MB?

On this page we use the decimal (SI) convention: 1 GB = 1000 MB, 1 MB = 1000 KB, and so on. That is what storage manufacturers, Google, and macOS use. The binary (IEC) convention (1 GiB = 1024 MiB), used by Windows and RAM, gives different numbers: 1 GiB = 1.073741824 GB.

Why does my computer show less space?

Hard-drive and SSD makers state capacity in decimal units (1 TB = 1000 GB = 1,000,000,000,000 bytes). Windows, however, counts in binary and reports the same capacity as GiB (dividing by 1024 instead of 1000). So a 1 TB drive shows as about 931 GiB in Windows — no space is missing, it is just a different unit (1 GiB = 1.073741824 GB). macOS has shown decimal GB since OS X 10.6.

What are these data-storage units used for?

Bytes and bits are the smallest units — 1 byte = 8 bits; bits per second measure bandwidth. Kilobytes (KB) and megabytes (MB) describe documents, photos, and songs; gigabytes (GB) and terabytes (TB) describe hard drives, SSDs, and data plans. All values here are decimal (SI).

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